TeaTime

Revolve Object is an interesting tool. The key thing is that it operates off the Selected Edge, and circles don't really have one, or, maybe more correctly they ONLY have one, so they're ... finicky. Try drawing a Circle in an Elevation View, then using the Convert Curve To Polyline tool to break the circle into a series of smaller edges. Then convert to a 3D Solid. This allows a specific edge to be selected in order to revolve around. I added +1 to the Rotate About X axis in this example to get a nice outward curve (rotating a full 90 at that exact edge tends to allow surfaces to merge and, well it's not a very realistic bend anyway.)

A sort of YinYang shape pair of Elevation Regions, separated with Retaining walls should achieve this effect:

There are a few ways I've found to make this work: Option 1: Single standard L-Shaped corner cabinet. Box Constriction: Framed. Separation: 0". Delete Door/Drawer to leave single Opening. The problem with this is that chief leaves a 0" thick surface on the main face of the cabinet that you can't get rid of. If you can ignore it, GREAT! Option 2: This looks the best but took 5--yes, five--cabinets. All set to Framed / 0" Separation as well. Two 12" on the left and right with Right and Left sides respectively, set to None. Two 3" on the inside of the 12", their noses overlapping, both Left and Right side set to None - this is purely to create the full toe kick. One 21"x21 in the center, Right or Left set to none, depending on which way it's facing. Option 3: Same as Option 1, but set the Cabinet material to "Opening (No Material)", Custom Back set to Panel - Inset Of course this one only really works well if there's cabinets on either side, like in OPs photo. The big issue with this one though is that the face edge of the bottom separation uses the box material, so it looks like a 0" surface. To fix this you have to go to the Front/Sides/Back panel, select the Opening, click the Shelves Specify button, set it to Manual, add an additional Shelf, and set it's Spacing From Previous to 0. Which pulls shelf 1 down... Still probably faster than making 5 weird cabinets that all have to play nice together. It would sure be nice if they'd add the ability to just remove the stiles.